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    <title>Document</title>
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    <script>

        // 获取对象的属性描述符
        var obj = {
            age: 10
        };

        Object.defineProperty(obj, 'aaa', {
            get() {
                return this._aaa;
            },
            set(n) {
                this._aaa = n;
            }
        })

        console.log(Object.getOwnPropertyDescriptor(obj, 'aaa'));


    </script>
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